In many cases the storage box will have some sort of cover or lid, which can be used to create a tight container box. This is a very important requirement in many cases because, because many items stored in the box can not be exposed to air. Another common situation is that, during road transport, there is the possibility that the stacked boxes are falling apart and losing their contents. To prevent this from happening, it is desirable to keep the container properly and sealed. This is only possible if the box has a secure lid that can be fixed after the box is filled with its contents.